Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: jeffs on October 11, 2015, 08:08:50 am

Title: Hoffman Fender Blues Junior Conversion with effects loop
Post by: jeffs on October 11, 2015, 08:08:50 am

Added a Riot Devices effects loop based on a 6N17B subminiature tube. 

The narrow space and lack of headroom to the back panel required mounting with angle brackets instead of an easy horizontal or vertical configuration.

I inserted the loop after the treble control, so needed to add a grid resistor for the next gain stage at the output of the board.

I also added a DC return path so the bias current wouldn't be forced onto the shields.